This game is impossible to lose if you turtle. Just stay near your base, which will protect you, and build your fleet. Repel waves of attackers, don???t venture out until you have a full fleet, then it???s just a total roflstomp. The tower defense waves are more challenging but same thing, stay behind base, build lots of cheap ships with until you have a big mass of firepower. The enemy comes straight for the base so just arrange your ships so the enemy gets eaten up when they enter the kill zone.